From owner-freebsd-fs@freebsd.org Mon Feb 15 14:29:13 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6C09CAA9F5C; Mon, 15 Feb 2016 14:29:13 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru [IPv6:2a01:4f8:131:60a2::2]) by mx1.freebsd.org (Postfix) with ESMTP id 3C7ED1337; Mon, 15 Feb 2016 14:29:13 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from [127.0.0.1] (unknown [89.113.128.32]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPSA id F24FFA024; Mon, 15 Feb 2016 17:29:09 +0300 (MSK) Reply-To: lev@FreeBSD.org To: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org From: Lev Serebryakov Subject: ZFS ARC vs Inactive memory on 10-STABLE: is it Ok? X-Enigmail-Draft-Status: N1110 Organization: FreeBSD Message-ID: <56C1E0B4.5080201@FreeBSD.org> Date: Mon, 15 Feb 2016 17:29:08 +0300 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Feb 2016 14:29:13 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 I have mostly-storage server with 8GB of physical RAM and 9TB (5x2TB HDD) raidz ZFS pool (so, about 6.5TB usable space). ARC is limited to 3GB by vfs.zfs.arc_max. This server runs Samba (of course), CrashPlan backup client (Linux Java!), and torrent client (transmission-daemon). And I'm noticing this regularly ("screenshot" of top(1)): Mem: 1712M Active, 3965M Inact, 2066M Wired, 137M Cache, 822M Buf, 4688K Free ARC: 421M Total, 132M MFU, 54M MRU, 1040K Anon, 7900K Header, 227M Other Swap: 4096M Total, 248M Used, 3848M Free, 6% Inuse As you can see, here are almost 4G of Inactive memory and only 412M of ARC! Is it Ok? Why Inactive memory (non-dirty buffers?) are pressed ARC out of memory? - -- // Lev Serebryakov -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJWweC0XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRGOTZEMUNBMEI1RjQzMThCNjc0QjMzMEFF QUIwM0M1OEJGREM0NzhGAAoJEOqwPFi/3EePRTYP/RHajhE+EuvX3fCppShb/BSg vpJZ8F1jeInIOVXe/XLw07jht04uquTXHsMvw6F0J+WIIqsCld53q1bfj4CWAnl6 4TjULTZYUWANv3wK6KxItEN5eMmDEPOW6Eqls57OSCFcZA/32hyf/Y15Nec0L6JD sd8wpqUvQs0zb//frbUpjIRcfoVSMO2ip4doGPDtBv9IcE/kDz78IcmU9By2deXU IJE8Xlg2hDY+f/NhTR2sCuwtCSvpL9/mBztffYqsKQsAm8oIn0Sz9mNdjVzUR+rN lF4GoxcWf6c3HEM/LF4+dgOdb058YwO4amyUI7GoBSFBQq3OlJzvomGeOi2vPAvC BkWxOWOcWsmEwfk1b22k00yNAjvaXQsCx6r2L/6vyrAtoQ0moXF4Rks8+MLFRUTu FFke93UUPRQPXBdrBtlnFpXX6jpmlEm7g9pazarGc4hteYOKpvHajFvNvAB7RswI NQL70+QfLBgtaA5683scCuURNptStf/RfvhwjW/o5DPNLv+NHnT+nPk64MTDuaZD 4z9Kcj088KjB++xt9c6BXuCS4zlkyUhas5cNGG+SxupZajtIuaCBTeUv0QwjnDH5 Pnu44Xe4MCvpDSt9odICdzytxO6yzwL7mLj70o2SsPs2ijN1w/fOlNqS46bekmJ/ MtvVwObCRnoDg3aMRUL0 =In6V -----END PGP SIGNATURE-----